darth-veitcher

Pattern below allows for a bash script to be called via, say, cron and check to see if it is already running.

Useful for things like rsync tasks.

PIDFILE=/var/run/myscriptname.pid

if [ -f $PIDFILE ]
then
 PID=$(cat $PIDFILE)

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

corsonr

<?php
// Display variations dropdowns on shop page for variable products
 add_filter( 'woocommerce_loop_add_to_cart_link', 'woo_display_variation_dropdown_on_shop_page' );
 
 function woo_display_variation_dropdown_on_shop_page() {
	 
 	global $product;

	if( $product->is_type( 'variable' )) {
	

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

spalladino

# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

vszakats

#!/bin/sh

# To the extent possible under law, Viktor Szakats
# has waived all copyright and related or neighboring rights to this
# script.
# CC0 - https://creativecommons.org/publicdomain/zero/1.0/
# SPDX-License-Identifier: CC0-1.0

# THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

vietj

public class JSON2Java {
  
   private static final ScriptEngine jsonParser;
   
   static
   {
      try
      {
         String init = read(Tools.class.getResource("json2java.js"));
         ScriptEngine engine = new ScriptEngineManager().getEngineByName("JavaScript");